Drag line shovel tooth



Oct. 17, 1944; c. w. CAMPBELL EI'AL 2,360,315

DRAG LINE SHOVEL TOOTH Filed July 14, 1943 ,W MMQZM AZTO/P/VE Y.

Patented Oct. 17, 1944 DRAG LINE SHOVEL TOOTH:

Clarence W. Campbell and John A. Vanes, Terre Haute, Ind.

Application July 14, 1943, Serial No. 494,718

3 Claims.

This invention relates to drag line shovel teeth, and the inventors regard it as an improvement on shovel teeth such as are usually applied at the mouth of buckets for augmenting the weight, causing the buckets to sink further in the dirt or deposit such as stone, for insuring the gathering of a greater load.

An object of the invention is to provide teeth of this character which may be removably applied to buckets, the said tooth having a point at the converging upper and lower walls of the tooth; and it is the purpose of the inventors to provide the tooth with cavities or recesses which may become filled during the dredging operation so that the tooth will move in the deposit without encountering undue friction which might cause wear on the surfaces of the tooth, since the deposits in the cavities permit the tooth to slide without material frictional contact of the tooth with the deposits.

It is a further object of the invention to provide these cavities by the formation of longitudinally and transversely extending ribs spaced apart a suitable distance. While the inventors do not wish to be limited with respect to the number of cavities formed or the number of in tersecting ribs, they can be changed, within predetermined bounds, without departing from the spirit of the invention.

As one example of the embodiment of the invention, it may be stated that the ribs encompassing the recesses are provided on the upper and lower surfaces of the tooth, and that part of the tooth or integral ribs forming the squares will be one-half inch in thickness and oneand one-half inch from center to center of the ribs, so that the recesses will be one-half inch in depth. Since these dimensions may be modified, as stated, it is the prime object of the inventors to provide these cavities for the purpose stated and the forward rib will be located about one and three-quarters inches rearwardly of the point of the tooth. By forming the ribs to produce the hollow squares, a great deal of material will be saved, whereas the ribs which receive the wear, due to the operation of the tooth, will lengthen the service and durability of the tooth and furthermore, the rebuilding and resurfacing of the tooth is simplified; hence, the invention is simple in construction and less expensive to produce and maintain.

With the foregoing and other objects in view, the invention consists in the details of construction, and in the arrangement and combination of parts to be hereinafter more fully set forth and claimed.

In describing the invention in detail, reference will be had to the accompanying drawing forming part of this application, wherein like characters denote corresponding parts in the several views, and in which:

Figure 1 illustrates a plan view of the upper surface of the tooth;

Figure 2 illustrates a plan view of the under surface of the tooth;

Figure 3 illustrates a sectional view on the line 33 of Figure 1.

In the drawing 5 denotes the point of the tooth which has an inclined upper surface 6 and a lower surface 1, at an angle thereto.

As the manner of forming the cavities in the two surfaces is the same, it may be said that each of these surfaces is provided with spaced longitudinally extending ribs 8 and spaced transversely extending ribs 9 which intersect or merge with the longitudinally extending ribs, and the spaces such as H encompassed by the ribs form seats or lodgments for deposits being worked, and that when said cavities are filled, the teeth slide through the deposits with the fillings in the cavities sliding on the material being worked, so that friction or wear on the surfaces of the ribs is modified and wear on these surfaces is reduced or minimized.

The ribs are shown as integral with the tooth structure and can be cast or produced at one operation with the production of the tooth and the area of the ribbed surfaces extends from locations rearwardly of the point to the rear edge of the tooth, and the presence of the ribs at the rear edge enables the operator of the drag lineto detect when the tooth has worn to an extent that the edge of the shovel is exposed to danger for lack of protection which is afforded it by the tooth. 1

We claim:

1. A drag line shovel tooth having a plurality of longitudinally extending ribs between the edges of the tooth and transversely extending spaced ribs on the upper and lower surfaces intersecting the longitudinally extending ribs, the area of said ribbed surface extending from a location rearwardly of the point to the rear edge of the tooth, forming cavities for the lodgment of material for eliminating wear on the said tooth.

2. A drag line shovel tooth consisting of a body with converging upper and lower surfaces and having a point at its front end, a plurality of spaced ribs extending longitudinally of the upper and lower surfaces, and spaced ribs extending transversely of the upper and lower surfaces of the body between the edges thereof, the area of said ribbed surface extending from a location rearwardly of the point to the rear edge of the tooth, the said longitudinal ribs intersecting the transversely disposed ribs and forming recesses between them, the said ribs augmenting the wearing surfaces of the said tooth. l0

3. A drag line shovel tooth consisting of a tooth in wedge form having its two faces provided with a plurality of transverse and longitudinal intersecting ribs with depressions in the space between them, the said plurality of longitudinally and transversely disposed ribs being located between the edges of the tooth and the said tooth being reversible and the point of the tooth being self-sharpening when reversed.

CLARENCE W. CAlVIPBE JOHN A. VANES. 

